6. It + be + time + S + V (-ed, cột 2) / It’s +time +for someone +to do something : (đã đến lúc aiđó phải làm gì...)e.g. It is time you had a shower.e.g. It’s time for me to ask all of you for this question.

7. It + takes/took+ someone + amount of time + to do something: (làm gì... mất bao nhiêu thời gian...)e.g. It takes me 5 minutes to get to school.e.g. It took him 10 minutes to do this exercise yesterday.

40. It’s not necessary for smb to do smt = Smb don’t need to do smt(Ai không cần thiết phải làm gì) doesn’t have to do smtVD: It is not necessary for you to do this exercise. (Bạn không cần phải làm bài tập này)